I have seen a youtube video with a 5-in-one FDM head. I was hoping to build a 3d printer that uses it for color printing, so where do you buy it. On another note: A Taiwanese 3d printer company is also using it. If a 6-in-one head exists, I would rather have that even but nothing comes up for that on google like the 5-in-one head did (an expensive printer and a video)